How to Pronounce Miosis

Miosis is pronounced my-OH-sis. The stress falls on the second syllable (OH), so you say it a bit like "my OH sis" with the emphasis on the middle part. The first syllable sounds like the word "my," and the last two syllables rhyme with "Oh sis."

Miosis has three syllables: mi-O-sis. When you say it out loud, you're breaking it into three distinct parts, with the middle syllable being the loudest.

People often accidentally stress the first or third syllable instead of the middle one, saying "MY-oh-sis" or "my-oh-SIS." The correct way is to put the stress on the second syllable: my-OH-sis.

Miosis comes from the Greek word "miein," which means "to diminish" or "to make smaller." The suffix "-osis" is a common medical ending that means "a condition or process." So the word literally means "a condition of becoming smaller."

Miosis means that the pupil of the eye has become unusually small. Think of it like your pupil closing up tighter than it normally would, making the dark circle in the center of your eye appear smaller than usual.

Yes! Mydriasis is the opposite of miosis—it means the pupil becomes abnormally large or dilated. Both words share the suffix "-iasis," which is a medical ending related to the Greek root meaning changes in the pupil's size.

You might hear a healthcare provider say, "The patient presented with miosis in both eyes," meaning both pupils appeared smaller than normal. Or in a classroom: "The ophthalmologist explained that miosis can be a sign of several different conditions affecting the nervous system."

While miosis doesn't have a standard abbreviation, it is sometimes written as "pinpoint pupils" in plain English descriptions because the constricted pupils can look like tiny dots. However, when you're reading or speaking medical language, "miosis" is the standard term.